<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <my-address></my-address>
    <!-- 商品列表标题 -->
      <view class="cart-title">
        <uni-icons type="shop" size="18"></uni-icons>
        <text class="cart-title-text">购物车</text>
      </view>
      <!-- 商品列表展示区域 -->      
      <uni-swipe-action>
        <block v-for="(item, i) in cart" :key="i">
        <uni-swipe-action-item :right-options="options" @click="swipeItemClickHandler(item)">
          <my-goods :item="item" :showRadio="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler" ></my-goods>
        </uni-swipe-action-item>
        </block>
      </uni-swipe-action>
      
      <!-- 结算组件 -->
      <my-settle></my-settle>
  </view>
  
  <!-- 空白购物车 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  import { mapState, mapMutations } from 'vuex'
  
  export default {
    mixins: [badgeMix],
      computed: {
        // 将 m_cart 模块中的 cart 数组映射到当前页面中使用
        ...mapState('m_cart', ['cart']),
      },
    data() {
      return {
        options:[{
          text: '删除',
          style: {
            backgroundColor: '#C00000'
          }
        }]
      };
    },
    watch: {
      total() {
        this.setBadge()
      }
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      radioChangeHandler(e) {
        this.updateGoodsState(e)
      },
      numberChangeHandler(e) {
        this.updateGoodsCount(e)
      },
      swipeItemClickHandler(item) {
        this.removeGoodsById(item.goods_id)
        this.setBadge()
      }
    }
  }
</script>

<style lang="scss">
  .cart-container {
    padding-bottom: 50px;
  }
  
  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;
    
    .cart-title-text {
      font-size: 14px;
      margin-left: 10px;
    }    
  }
  
  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
    .empty-img {
      width: 90px;
      height: 90px;
    }
    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
